21798513

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{541}}^1$

素因数の和:606

約数の個数: 36

約数和(自身を含む): 35610484

約数和(自身を除く): 13811971

約数列:

[1, 3, 9, 11, 33, 37, 99, 111, 121, 333, 363, 407, 541, 1089, 1221, 1623, 3663, 4477, 4869, 5951, 13431, 17853, 20017, 40293, 53559, 60051, 65461, 180153, 196383, 220187, 589149, 660561, 1981683, 2422057, 7266171, 21798513]

約数ペア:

[(1, 21798513), (3, 7266171), (9, 2422057), (11, 1981683), (33, 660561), (37, 589149), (99, 220187), (111, 196383), (121, 180153), (333, 65461), (363, 60051), (407, 53559), (541, 40293), (1089, 20017), (1221, 17853), (1623, 13431), (3663, 5951), (4477, 4869)]